What do the following words have in common that has nothing to do with their meanings?

 

NO

OF

OH

UP

US

NIP

SIN

KIN

BUS

CUP

CON

UNION 

HINT:

Look at the letters, not the words.

Answer:

 

The words are made up entirely of single letters that stand for elements:

 

N itrogen

O xygen

F lourine

H ydrogen

U ranium

P hosphorus

B oron

I odine

S ulfur

C arbon

K - Potassium